248, 249

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Vishay Spectrol

Revision: 30-Aug-17

2

Document Number: 57054

For technical questions, contact: sferpottrimmers@vishay.com

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000

Note

• Hardware supplied in separate bags

ELECTRICAL SPECIFICATIONS

PARAMETER

MODEL 248

MODEL 249

Element type

Conductive plastic

Cermet

Total resistance range

500

 to 1 M

Standard series

1, 2, 5

Resistance tolerance

± 20 %

± 20 % (on request ± 10 %)

Power rating

Linear

0.5 W at 70 °C

1.0 W at 70 °C

Circuit diagram

Temperature coefficient of resistance (typical)

± 500 ppm/°C

± 150 ppm/°C

Linearity (typical)

± 5 % independent

Limiting element voltage

300 V

Contact resistance variation (typical)

5 % of the total resistance

Insulation resistance

1000 M

 minimum, 500 V

DC

Dielectric strength

750 VRMS minimum 50 Hz / 60 Hz

End resistance

2

 maximum each end

Effective electrical travel

265° ± 5°

0

50

150

125

0

AMBIENT TEMPERATURE IN °C

70

25

100

0.5

0

50

150

125

0

AMBIENT TEMPERATURE IN °C

70

25

100

1

1

2

3

CW

MECHANICAL SPECIFICATIONS

Mechanical travel

295° ± 5°

Operating torque

0.1 Ncm to 2 Ncm

End stop torque

35 Ncm (50 oz.-inch)

Max. tightening torque

150 Ncm

Weight

8.3 g (0.29 oz.)

(1/4" x 7/8" FMF metal shaft)

ENVIRONMENTAL SPECIFICATIONS

Temperature range

-55 °C to +125 °C

Climatic category

55 / 125 / 4

Sealing

IP 50

MARKING

•Vishay model

•Vishay logo

•Variation law

• SAP code for ohmic value

• Tolerance in %

• Date code (4 digits)

• Terminal identification “3” for lead 3

PACKAGING

• In box of 25 pieces, code BO25